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A269579 as a simple table

na(n)
15
225
3125
4613
52969
614239
767763
8320495
91508267
107069055
1133020571
12153815099
13714838023
143315709471
1515354722091
1671009625019
17328017083175
181513765237255
196980228317107
2032165146949139
21148133524803711
22681887792337519

[5,25,125,613,2969,14239,67763,320495,1508267,
 7069055,33020571,153815099,714838023,3315709471,
 15354722091,71009625019,328017083175,
 1513765237255,6980228317107,32165146949139,
 148133524803711,681887792337519]